Created
March 21, 2017 08:23
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| function optionalChaining(obj, chain) { | |
| return chain | |
| .split('.') | |
| .reduce(function(acc, val) { | |
| return acc ? acc[val] : undefined; | |
| }, obj); | |
| } | |
| var user = { address: { street: 'No.969 West WenYi Road', }, a: { b: { c: 2 } }, } | |
| var ret = optionalChaining(user, 'address'); | |
| console.log(ret) |
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